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- W2134941330 abstract "A fundamental assumption underlying the application of genetics within conservation biology is that inbreeding increases the risk of extinction. However, there is no information on the shape of the relationship, the available evidence has not distinguished genetic and nongenetic effects, and the issue is controversial. Methods were devised to separate genetic and nongenetic causes of extinction in inbred populations, and they were used to analyze data from Drosophila melanogaster, D. virilis and Mus musculus. Inbreeding markedly increased rates of extinction in all cases. All showed a threshold relationship between incremental extinction and inbreeding with low initial extinction, but they showed notably increased extinction beginning at intermediate levels of inbreeding. There was no difference in extinction levels at similar inbreeding coefficients in populations inbred at different rates (full sibling versus double first cousin). Endangered species may give little warning of impending extinction crises due to inbreeding. Una suposición fundamental que resalta la aplicación de la genética en la conservación biológica es que la endocría aumenta el riesgo de extinción. Sin embargo, no existe información sobre la forma en que la endocría y el riesgo de extinctión estan relacionados; la evidencia disponible no ha distinguido entre efectos genéticos y efectos no genéticós y este problema resulta controversial. En el presente estudio se desarrollaron métodos para distinguir entre las causas genéticas y no genéticas de la extinción en poblaciones con endocría y los mismos fueron usados para analizar datos sobre Drosophila melanogaster, D. virilis y Mus musculus. La endocría incrementó marcadamente las tasas de extinción en todos los casos. Todos mostraron una relación umbral entre la extinción progresiva y la endocría con una baja tasa de extinción al principio, pero una tasa de extinción notablemente aumentada al alcanzar niveles de endocría intermedios. No existieron diferencias en los niveles de extinción en poblaciones con niveles de endocria similares pero endocriadas a tasas diferentes (hermano versus doble primo hermano). Las especies en peligro, no darían muchas señales de peligro antes de que las crisis de extinción debidas a la endocría se desencadenen." @default.
- W2134941330 created "2016-06-24" @default.
- W2134941330 creator A5017062268 @default.
- W2134941330 date "1995-08-01" @default.
- W2134941330 modified "2023-10-17" @default.
- W2134941330 title "Inbreeding and Extinction: A Threshold Effect" @default.
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- W2134941330 doi "https://doi.org/10.1046/j.1523-1739.1995.09040792.x" @default.
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